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Old 11-05-2012, 09:56 PM   #3
Focus Enthusiast
Join Date: Mar 2012
Fan#: 97061
Location: South Lyon, MI
What I Drive: 2005 Silver ZX3

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What is your Mileage?

I had the same issue with my 2005 ZX3. I had a 150K miles and the gauge was still in the green but I new I had to replace it.

If yours has under a 100K and the gauge is still green I wouldn't worry about it for a while. I saw no real degradation in fuel economy.

I ended up putting a FS CAI (long tube) system on it and am very pleased.

Hope this helps?
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